How many coats of AF do you apply?

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PhillM

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I am off to do the Anti Foul tomorrow. Im on the Hamble and use Tiger Xtra. For the last two years, I have done a roller coat, waited a couple of hours, then brushed over the top to get a full thick coat.

Then let it all dry overnight and then do the same again. Used about 2.5L on my 25 footer.

Apart from some growth round the prop and slime on the bottom, she has been clean 9 or 10 months later.

The plan is to leave her in for a full 12+ months this time.

Should I apply a 3rd coat?

Suggestions please.

EDIT: Should say boat is wooded - but I dont think that makes any difference to the AF does it?
 
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I think you need to put more on. Probably 3.5 to 4 litres for a full 12 months.

It might be worth considering using a more expensive antifoul, which might give you the protection you need with a smaller volume of paint.

I only antifoul once every 2 years, and the boat is in the water the rest of the time. Using Micron Extra, I need about 4.5 litres to give 2 years' protection on a 35 footer.
 
pvb said:
I think you need to put more on. Probably 3.5 to 4 litres for a full 12 months.

It might be worth considering using a more expensive antifoul, which might give you the protection you need with a smaller volume of paint.

I only antifoul once every 2 years, and the boat is in the water the rest of the time. Using Micron Extra, I need about 4.5 litres to give 2 years' protection on a 35 footer.
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Also used to use Micron Extra and also 'in' for two years at a time no problem, now use Jotun Seaqueen as almost half the price for twice as much, also apply two coats ontop of the Primer coat

Mike
 
magazine tests a couple of years ago concluded as far as I can remember that the number of coats was more important than the make of antifoul. If 2 coats works for 9 months of the year another 3 wont make much difference specially in the winter when temperatures are lower
 
Caer Urfa said:
Also used to use Micron Extra and also 'in' for two years at a time no problem, now use Jotun Seaqueen as almost half the price for twice as much, also apply two coats ontop of the Primer coat

Mike
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+1 for Jotun, except I use Seaforce 30. It's thick stuff and a 5L tin is only £80 from Bayside marine. (http://www.baysidemarine.co.uk/jotun-seaforce-30-erodible-antifouling-5-litres-2229-p.asp.)

I used only one coat on our 33'er last year ('cos we laid it on thickly and there was only enough to do the one coat). When she came out in December, there were only (and I mean only) 11 barnacles on the entire hull. Also, it did not deteriorate to the horrible dry powdery surface over the winter. You could rub your hand over it and come away without blue mitts.

It's supposed to last up to 36 months in the water. I believe it might!

Cannot recommend it more highly and Bayside are superb suppliers - prompt despatch and great service.
 
A single coat of Tiger Extra for me and the boat comes out beautifully clean. Why put on more than you need - it will build up to the point you have a nightmare job to strip it all off!
 
makingplansfor said:
A single coat of Tiger Extra for me and the boat comes out beautifully clean. Why put on more than you need - it will build up to the point you have a nightmare job to strip it all off!
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+1 I use Interspeed Ultra no issues with one coat. Bonus this year 25% off as the formula is changing to meet new EU regs.
 
Two coats of EBAY's best lasts me for 2 seasons in Emsworth mud. So what? ... says nothing about how it will perform on a boat in a different location used in a different way. Even if you buy BIG BRAND and find one that seems to work well, chances are that the formula will have changed by the time you buy the next batch.
 
Used to have three.

Black then Red then Black.

When the red became visible then it is time for another coat


I use SeaHawk Islands 44 Plus™

Tin-Based – 1000 Series

Islands 44 Plus was developed for the harshest tropical environments in the world. Islands 44 Plus is a multi-seasonal self-polishing paint. It has a high load of copper and tin that will ensure maximum protection against marine growth. Islands 44 Plus is also available in a hard formulation. It has the same properties, just a little harder, for our "mega" yacht customers.

Self-cleaning copolymer with high load of tin (TBT) and copper
The only tin (TBT) paint available on the market
Highest level of antifoulant protection available
Highest quality grade of cuprous oxide available (more potent active ingredient)

nn12443.jpg
 
makingplansfor said:
A single coat of Tiger Extra for me and the boat comes out beautifully clean. Why put on more than you need - it will build up to the point you have a nightmare job to strip it all off!
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+2 I can't see the sense in applying multiple coats to get a thick layer. I've applied a single coat of Seajet Emporer every year for the past eight years and we've always had a very clean hull when annually lifted out. And the big bonus is that after eight years we've no big build up of AF that requires removal. In fact the eroding AF almost seems to have eroded away by the end of the season; I see it as a natural cleansing process. So I've saved about £500 on a blasting contractor, say £60 pa, so cheap antifouls might not be as cheap as they seem.

Rob
 
PhillM said:
The plan is to leave her in for a full 12+ months this time.
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You'll be fine with your normal routine. Next year wait until you get good weather and have a weekend lift to apply the new stuff. painting in shorts is much nicer even if you do lose a sailing weekend.
 
My yacht is based at one of the high fouling marinas in Scotland. I use Cruiser Uno, one coat applied thickly with a medium hair roller (I don't roll out the paint, about 2 square feet per roller load), double coats at leading and trailing edges, the quantity applied is 8 litres for a 41' LOA, deep forefoot, encapsulated fin keel and skeg type hull. The yacht stays in for two years. At the end of last season she came out with some slime; she had not been sailed for about 3 months prior to lifting.

8627545128_f5532e5192.jpg
 
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Thanks everyone. I took a look at what was left after a year and I reckon about half has gone.

We have put a thick brush coating on where we had to repair / prime. Then gone over the whole hull with a thick roller coat, touched up by brush and a final brush load at the waterline and stem. Used the whole 2.5L except for a bit saved for under the keel supports on launch day.

I had not realised that there would be less growth over the winter - so that was a good tip, thanks.

The plan is to sail until winter, then layup afloat and pull her out about this time next year.
 
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